Incredibly comprehensive. Learn and understand this lot and you will have a fine grasp' Jon Snow'This sets the standard for every radio newsroom' - Andy Ivy, Editor, Sky News Radio In an age of infinite choice made possible by new technology, and a disturbing move away from traditional reporting...

Free entry into markets with decreasing average costs and differentiated products can result in an inefficient number of firms and suboptimal product variety. Because new firms and products draw their customers in part from existing products, concentration can affect incentives to enter as well...